Winter Time & DST

This time zone is a daylight saving/summer time zone, in the winter some places will switch to the corresponding standard time zone: AST (Atlantic Standard Time).

Email time zone indicator: -0300

An email sent from someone in the Atlantic Daylight Time (ADT) time zone will have the time zone listed as "-0300" in the headers of the email. (However, "-0300" does not have to be in Atlantic Daylight Time, as other time zones could have the same UTC offset).